find the z test statistic

label Statistics
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Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2.  Use the given sample sizes and numbers of successes to find the z test statistic for the hypothesis test.

 A random sampling of sixty pitchers from the National League and fifty-two pitchers from the American League showed that 15 National and 10 American League pitchers had E.R.A's below 3.5.    
Jul 29th, 2015

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p1=60/15,p2=52/10 p = 92/5

92/5-3.5=14.9=149/10

Test statistic z=14.9

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Jul 29th, 2015

my options are 

z=127.077

z=10.583

z=0.731

z=0.950

am I missing a step?

Jul 29th, 2015

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